feat: explorer API, wallet, CCIP scripts, and config refresh

- Backend REST/gateway/track routes, analytics, Blockscout proxy paths.
- Frontend wallet and liquidity surfaces; MetaMask token list alignment.
- Deployment docs, verification scripts, address inventory updates.

Check: go build ./... under backend/ (pass).
Made-with: Cursor

backend/api/rest/validation_test.go

@@ -0,0 +1,23 @@
+package rest
+
+import "testing"
+
+func TestNormalizeAddress(t *testing.T) {
+	input := " 0xAbCdEf1234567890ABCdef1234567890abCDef12 "
+	got := normalizeAddress(input)
+	want := "0xabcdef1234567890abcdef1234567890abcdef12"
+
+	if got != want {
+		t.Fatalf("normalizeAddress() = %q, want %q", got, want)
+	}
+}
+
+func TestNormalizeHash(t *testing.T) {
+	input := " 0xABCDEF1234567890ABCDEF1234567890ABCDEF1234567890ABCDEF1234567890 "
+	got := normalizeHash(input)
+	want := "0xabcdef1234567890abcdef1234567890abcdef1234567890abcdef1234567890"
+
+	if got != want {
+		t.Fatalf("normalizeHash() = %q, want %q", got, want)
+	}
+}